Sodium Vinyl Sulfonate (SVS) Emulsion Stabilizer
Número CAS: 3039-83-6
Sodium Vinyl Sulfonate (SVS) is a sulfonate-functional ionic monomer supplied as a 25–30% aqueous solution that polymerizes directly into the latex particle shell, providing permanent anionic charge and colloidal stability without migration. Incorporation at 0.5–3% of monomer charge improves mechanical and freeze-thaw stability of the resulting latex, enhances adhesion to polar and metallic substrates, and is particularly valuable in formulations where conventional surfactant migration causes adhesion loss or foaming.
Especificaciones Técnicas
| pH | 6.0–8.0 |
| color APHA | ≤30 |
| active content | 25–30% (aqueous solution) |
| sodium sulfate byproduct | ≤1.0% |
Aplicaciones
- Acrylic and styrene-acrylic latex stabilization
- Metal primer waterborne adhesive emulsions
- Paper coating latex with improved wet-rub resistance
- Freeze-thaw stable construction adhesive emulsions
- Nonwoven binder with reduced surfactant migration
Características Principales
- Sodium Vinyl Sulfonate is permanently copolymerized into the latex backbone, eliminating surfactant migration and associated adhesion loss
- Strong anionic charge (sulfonate pKa <1) provides colloidal stability across a broad pH range
- Improves freeze-thaw stability of latex by 3–5 cycles compared to surfactant-only stabilization
- Compatible with persulfate, redox, and azo initiator systems at typical polymerization pH 2–8